1999
DOI: 10.1016/s0969-8043(98)00086-4
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Groundwater flow system in the valley of Toluca, Mexico: an assay of natural radionuclide specific activities

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Cited by 13 publications
(5 citation statements)
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“…Uranium and 226 Ra concentrations in the water samples were also low. The local flow belongs to a shallow water system, recognized by its low radon content and dissolved ions compared with regional deeper groundwater flow with a longer residence time (Segovia et al, 1999a). Average radon concentrations in water samples from springs and wells of the Upper Lerma river (located in the State of Mexico) were relatively low, ranging from 0.9 to 4.99 Bq L -1 .…”
Section: Radon In Groundwater and Drinking Water Supply Systemsmentioning
confidence: 99%
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“…Uranium and 226 Ra concentrations in the water samples were also low. The local flow belongs to a shallow water system, recognized by its low radon content and dissolved ions compared with regional deeper groundwater flow with a longer residence time (Segovia et al, 1999a). Average radon concentrations in water samples from springs and wells of the Upper Lerma river (located in the State of Mexico) were relatively low, ranging from 0.9 to 4.99 Bq L -1 .…”
Section: Radon In Groundwater and Drinking Water Supply Systemsmentioning
confidence: 99%
“…Concentrations of 222 Rn, natural radionuclides, and physicochemical conditions were determined in groundwater samples from wells and boreholes of the drinking water supply system of Toluca City (Olguin, Segovia, Tamez, Alcantara, & Bulbulian, 1993;Segovia et al, 1999a). In other places, for example Mexico and Michoacan states, chemical analysis of major and trace elements, and determination of radon were also performed in springs and wells from urban and agricultural zones in the Lerma river basin Alfaro et al, 2002).…”
Section: Introductionmentioning
confidence: 99%
“…Desde el punto de vista térmico (Castany, 1971), a las aguas de Guacamayas y El Cayaco se les clasifica como de tipo hipotermal mientras las del El Cortés como mesotermal. Las variaciones de temperatura en agua subterránea en Guacamayas y El Cayaco pueden depender de la temperatura ambiente local (Castany, 1975); no así en el manantial El Cortés donde la temperatura puede deberse al efecto del gradiente geotérmico, así como a flujos regionales que pueden ser captados por acuíferos profundos (Fletcher, 1995;Segovia, et al, 1999a). Araujo et al (1999) reportaron temperaturas de manantiales superiores a 55 °C, explicando que el gradiente térmico puede ser el producto de fluidos altamente calentados por un basalto cristalino estancado.…”
Section: Elementos Y Compuestos Químicos Mayoresunclassified
“…Las aguas sulfatadas cálcicas se caracterizan por el elevado contendido de sulfatos y son ricas también en sodio y potasio (Castany, 1971). El agua bicarbonatada cálcica generalmente pertenece a agua subterránea que procede de rocas ígneas (Custodio y Llamas, 1983;Segovia et al, 1999a). En aguas clorurada-sódicas predominan los cloruros, son ricas en Cl y Na y se caracterizan por ausencia de carbonatos.…”
Section: Elementos Y Compuestos Químicos Mayoresunclassified
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